Most dominant mineral in earth crust is

The most dominant mineral in the earth's crust is Feldspar. It makes up about 60% of the Earth's crust and 41% of the Earth's continental crust by weight.
Feldspar is a group of rock-forming aluminum tectosilicate minerals, containing sodium, calcium, potassium, or barium. Silicon ions are linked by shared oxygen ions to form a three-dimensional network.